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218. Conditions necessary for an electron to absorb a photon include
    
A. photon must hit the electron. These are the three conditions necessary before an electron can absorb a photon and move into an orbital of a higher energy level.

The Correct Answer is D.

B. The photon must have the exact amount of energy necessary to move the electron into a new orbital.
C. There must be room in the new orbital for the electron.
D. all of the above.